Yes. I don't think that entire flow tables generally appear or disappear though. They would normally just be empty or nonempty.
On Sun, Aug 21, 2011 at 05:02:42PM -0500, Chen Gao wrote: > Dear Ben, > > Thank you for your quick reply. > > Can I understand that in openflow 1.0 for user like me, I only need to think > about whether to add flow entry or not or what's the content of flow entry > to add? I don't need to care about which flow table the flow entry been > added? Because the switch itself has some mechanism for allocating these > flow entries? And the switch will add or delete flow tables as it needs? > > Regards, > Chen > > > -----Original Message----- > From: Ben Pfaff [mailto:[email protected]] > Sent: Sunday, August 21, 2011 4:48 PM > To: Chen Gao > Cc: [email protected] > Subject: Re: [openflow-discuss] Question about relationship between datapath > and flow tables > > On Sun, Aug 21, 2011 at 03:50:05PM -0500, Chen Gao wrote: > > In the white paper, it said that the datapath of an openflow switch > > consists of a flow table, and an action associated with each flow > > entry. So I understand that datapath contains many flow tables, and > > each flow tables contains many flow entries. > > > > When I set up a datapath in Stanford implemented reference switch, I > > can add flow entry to the datapath. However, I don't know the command > > how to specify a flow table. > > If you are talking about OpenFlow 1.0, then the flow table cannot be > specified. In OpenFlow 1.0, the arrangement of flow tables is meant to > explain the internal structure of the switch, and the switch is allowed to > place a flow in whichever flow table it believes best suits that flow. > > In OpenFlow 1.1, the situation is different. I believe that it is possible > to place a flow in a specific table. I don't know how to do that with the > reference switch; I would have to look it up there also. > _______________________________________________ openflow-discuss mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
